Fig. 2

Crystalline lens transmittance spectra in vivo measured by Purkinje image-based system [50]. The lens transmittance spectrum in children is shown by a red line, that in young adults is shown by a blue line, that in middle-aged adults is shown by a green line, and that in the older adults is shown by an orange line. Depicted from data in Eto 2020 [50] and Eto 2021 [51]